Open AccessHeterogeneous Bimetallic Selenide Anchored Carbon Nanotubes for Boosted Hydrogen Reactions
Author(s) -
Bin Wang,
Xiaojuan Zhang,
Yuanfu Chen
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1838/1/012018
Subject(s) - tafel equation , overpotential , materials science , bimetallic strip , electrolyte , chemical engineering , selenide , carbon nanotube , annealing (glass) , nanotechnology , metal , electrode , chemistry , electrochemistry , composite material , metallurgy , selenium , engineering
Herein, bimetallic sulphide CoSe 2 -FeSe 2 anchored on the surface of carbon nanotube (CNT) networks are prepared via a selenization and subsequent annealing process. The CoSe 2 - FeSe 2 /CNT hybrid shows excellent property for electrocatalytic hydrogen evolution reaction, featured by a low Tafel slope of 39 mV dec −1 , an overpotential of 205 mV (10 mA cm −2 ), as well as good long-term stability in 0.5M H 2 SO 4 electrolyte. The outstanding HER performance is mainly due to the synergistic effects of the bi-metallization and its unique porous nanoarchitecture: the bi-metallization causes strong coupling interaction between CoSe 2 and FeSe 2 , which facilitates the charge transfer at the interfaces and the reconfiguration of the partial electron structure; the porous nanoarchitecture enable the close contact between electrolyte and active site as well accelerate the evolved gas bubbles releasing. This work provides insight into facile fabrication of bi-metallic selenide electrocatalysts with excellent HER performance in acid medium.